Sorry, I would go with a 12K winch on the E350 Airstream. I've got a couple of projects going on right now and I was thinking of a rally car when I commented on the 8K winch.
I leave tomorrow to go pick up the Airstream. The weather in Ohio will be good for a spell, so we'll put it to the test right away at Hocking Hills State Park and then again in Nashville, TN on the return trip. We're going to give the ol' Airstream a go and see how it fits the family and our needs, plus pay a visit to Chris and U-Joint's operations in May. Then we'll decide whether to go 4X4 or not. I really need to look at the costs. I'm a mechanic and can do all of the install myself. I thought the cost was up around $10K, but if I can get the parts for just $5K I might bite the bullet and go that route.
Kirk